Senior Test Automation Engineer (.NET / C#)

Billennium is a global technology company with over 20 years of experience, committed to innovation and empowering businesses. As an employer, we offer a supportive, growth-focused environment where collaboration and creativity thrive. Join us to shape the future of technology together!

We are looking for an experienced Senior Test Automation Engineer to join a long-term project for a global technology company.

What you will do

• Design and develop scalable automated test frameworks using C#
• Create and maintain UI, API, and integration test suites
• Collaborate closely with developers, Product Owners, and QA teams
• Participate in test strategy definition and quality assurance processes
• Analyze defects and support root cause investigations
• Integrate automated tests with CI/CD pipelines
• Mentor junior and mid-level QA engineers
• Drive continuous improvement of testing standards and best practices

What we are looking for

Must have

• 5+ years of experience in software testing and test automation
• Strong knowledge of C# and .NET ecosystem
• Hands-on experience with Selenium WebDriver or equivalent test automation tools.
• Experience in API testing using RestSharp or similar tools
• Experience with SpecFlow / BDD approach
• Good understanding of SQL databases
• Practical knowledge of Git and Azure DevOps
• Experience integrating automated tests into CI/CD pipelines
• Strong understanding of Agile methodologies
• Fluent English (B2+)

Nice to have

• Playwright with C#
• Performance testing experience
• Azure Cloud exposure
• ISTQB certification
• Docker knowledge

Perks and benefits (our offer)

• Comprehensive benefits - enjoy Udemy for Business, private medical care, Multisport card, veterinary package, language lessons, and shopping vouchers.
• Flexibility - adaptable working hours and remote/hybrid work options to suit your lifestyle & location.
• Career growth - access opportunities for professional development and learning, including perks related to our official partnerships with global IT giants: Microsoft, AWS, Snowflake, Salesforce & more.
• Global collaboration - work with a diverse, international team.
• Innovative environment - be part of a forward-thinking and growth-oriented workplace.
• Engaging community - Work with passionate professionals and participate in team-building events, hackathons, and CSR initiatives to make an impact beyond work.
• Team-building events including our company tradition (annual company event in Mazury).
• A pleasant surprise to start your journey with us in the form of a welcome pack.